20 Most Recent Roku HD Player (N1100) - Page 3 Questions & Answers

Considering you replaced all 3 boards, if you received working boards there isn't anything else that can cause this other than the panel itself, this set has the tcon board incorporated into the main board, other than the driver IC, that's part of the panel boards, chances are that's where the issue is at. This IC can be replaced however I'm doubtful you would have the equipment to do it, you would need to remove the panel, then isolate the connectors from the board to the panel as they will be destroyed by the heat needed to replace the IC, remove the IC with a heat gun, and install a new one with the same method, it's basically impossible to do unless you have advanced soldering skills and the correct equipment that most people would not own. We've changed a number of them in our repair center but we have the know how and equipment to do it, we charge around $100 to replace it. You could check around your area for a service center that does it, it's also possible it could be something in the panel itself however we've found in most cases on this model panel it's the reg ic

Check for appropriate voltages going to the backlights from the PSU. If voltages are ok and still no backlights you may have to take the screen off and use a backlight tester to verify the individual strips integrity. This is tricky and you stand the risk of damaging the panel so be careful or get a professional to do it. If you are wondering why not purchase new backlights because everything else seems to be fine but the backlights are the only thing that's not functioning, that's because it is possible that the paper thin strip that connects all the individual backlight strips is shorting to the frame. We've had the same issue with this model and other brand/model that uses the same paper thin strip. We became aware that the strip was shorting to the frame by accident when we disassembled the screen an got to the backlights. We happened to be touching the connector strip and the metal frame and got a jolt and the backlights lit up momentarily when that happened. So we used a meter and verified there was a short. To rectify this situation (first verify that all your backlights are still good by using a backlight tester) then use a piece of electrical tape ( the length of the connector strip)and place the connector strip squarely an the tape providing extra insulation between the connector strip and the metal frame. If you don't have a backlight tester and you're just a do-it-yourselfer you can (since you are already at the connector strip) just proceed to use the electrical tape as described above and if you get backlights now then walla. You don't have to reassemble the screen to test if the backlights work. Just plug in TV and press the power button. The backlights will come on anyway. The pictures shows the connector strip placed on the black electrical tape.

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If you're unable to change the backlight brightness on your TCL Roku TV and the backlight remains on even when the LCD screen is turned off, there may be an issue with the TV's firmware or hardware. Here are a few things you can try:

1. Reset the TV: Sometimes resetting the TV to its default settings can fix issues like this. To reset your TCL Roku TV, go to Settings > System > Advanced System Settings > Factory Reset. Note that this will erase all your settings and preferences, so you'll need to set them up again.
2. Check for updates: Make sure your TV's firmware is up to date. Go to Settings > System > System update and check for updates. If there's an update available, download and install it.
3. Check the cables: Make sure all the cables connected to your TV are securely plugged in. If the backlight issue started after you took the TV apart, it's possible that a cable came loose or wasn't plugged in correctly.
4. Contact TCL support: If none of these steps work, it's possible that there's a hardware issue with your TV. Contact TCL support for assistance or consider taking the TV to a repair shop.

If you have replaced the power supply board and there is still no voltage to the LEDs, there could be a problem with the LED driver board or the LEDs themselves. First, try to check the LED driver board for any visible signs of damage, such as burnt or swollen components. If there is no obvious damage, you may need to test the board using a multimeter to check for any faulty components. If the LED driver board is not the problem, it is possible that the LEDs themselves have failed. To check this, you can use a multimeter to test the voltage across the LED terminals. If there is no voltage, the LEDs may need to be replaced. It is also worth checking the cable connections between the LED driver board and the LEDs to ensure that they are secure and properly connected.

To connect a Roku box to an LC320EM2 TV, you'll need to follow these steps:

1. Connect the Roku box to the TV using an HDMI cable. Locate the HDMI port on the back of the TV and plug one end of the cable into the Roku box and the other end into the TV.
2. Power on the Roku box and the TV.
3. Change the input source on the TV to HDMI by pressing the "Input" or "Source" button on the TV remote. Keep pressing the button until you reach the HDMI input that the Roku box is connected to.
4. Follow the on-screen instructions on the TV to complete the Roku box setup process. This will involve connecting the Roku box to your home Wi-Fi network and creating a Roku account.
5. Once the setup is complete, you should be able to use the Roku remote to access various streaming services, such as Netflix, Hulu, and Amazon Prime Video, on your LC320EM2 TV.

If you have any issues during the setup process, refer to the Roku box manual or contact Roku customer support for further assistance.

Opposed to me typing or pasting someone else's info here is what appears to be the best solution for you... https://sensemother.com/onn-roku-tv-red-light-blinking/

99% chance of it being the backlights as they fail very often on ONN brand TV's.

What board are you calling the "control board" are you talking about the t-con board or main board?

If your TCL Roku 55S401 is stuck in a boot loop, there are a few things you can try to fix it.

1. Try unplugging the TV from power for at least 45 seconds, and then plugging it back in and try if it boots.
2. Try doing a factory reset on the TV by going to the TV settings and selecting "Factory reset."
3. If none of these steps work, contact TCL support for further assistance.

Please note, if the TV is still under warranty, it is better to contact the manufacture first.

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You can hear the audio and see the screen with a flashlight, but it appears as though your TCL Roku 55s421 television is showing a black screen. Various factors could be to blame for this problem. A few troubleshooting tips are provided below: Verify the connections. Check to see that your TV, cable box, and streaming device are all correctly connected. Look over the settings: Verify that the cable box or streaming device is set to the appropriate output and that the TV is set to the proper input.

Verify the backlight. Some TVs feature an adjustable backlight setting.

Check to make sure the backlight setting is not off or too low.

Check for a firmware update: Check if any firmware updates are available for your TV and ensure that it's up to date. Check the cable: If the cable that connects the TV to the wall outlet is damaged, the TV won't turn on. Try unplugging the TV, waiting a few minutes, and plugging it back in. Contact the manufacturer: If none of the above solutions work, it may be necessary to contact the manufacturer for further assistance. Your TV may require repair or replacement.

Question edited for clarity. You wrote 'roku heinse', I presume you meant 'Roku Hisense'? Seems to be a known issue. A few idea in the link, but Hisense are not a good television. https://www.google.com/search?q=Roku+Home+Screen+but+is+very+hard+to+see+unless+up+close ..

Has to be the thickest on the customer side surely, and I doubt it matters anyway.

Shine a bright light at the screen. If you can see a picture, the backlight is faulty.

Roku Error Code 003

1. To restart the Roku device, press the home button and then choose the.
2. Go to system and select the system restart.
3. Now your Roku device will get restarting.
4. And to restart your router, you can simply switch off and switch on it.
5. For some router, there is a reset button in it.

https://www.google.com/search?q=How+to+Fix+Roku+Error+code+003?+How+to+fix+Fix+Roku+Error+Code+003?+Ways+to+Fix+Roku+Error+Code+003,+Roku+Error+Code+003&tbm=isch&source=iu&ictx=1&fir=fH-i7TGRTkegRM%253A%252CDOc1RLfBT3nAGM%252C_&vet=1&usg=AI4_-kQ9cpYhpf67A9fYht5g19DASMg6tw&sa=X&ved=2ahUKEwiE7KL6k7DoAhXwAWMBHacnD40Q9QEwAHoECAYQAw#imgrc=fH-i7TGRTkegRM: https://activatestreaming.com/2018/11/21/roku-error-code-003/ https://www.customer-supports.com/blog/how-to-troubleshoot-roku-software-error-code-003

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Create a Roku account

https://my.roku.com > signup A Roku account gives you access to the Roku Channel Store. Simply complete all fields below to get started. You will need to supply either a credit card or ...